It took around 80 hours of development time to create this bowling scene in Blender 2.91 and 2.92A. The render times pretty long even on an RTX 2070. I haven’t tried this since I got my RTX 3090, but I imagine it would be about 3 times faster now. The original inspiration was a CG
Taken from an Ian Hubert Tutorial creating this underwater scene with leisurely Jellyfish took around 20 hours. The Jellyfish themselves are relatively simple geometrically, as you can see below, most of their jelly-ness comes from the cloth and physics simulations that drive their floppy bits and pulsing motion.